As the title says, would it be possible to give an option to be able to use the "Larger Macro Icon Selection" addon
as it is so much better/flexible which helps a lot to find the correct icon :)

https://www.curseforge.com/wow/addons/larger-macro-icon-selection

Cheers

Or even just a simple icon id search ? :)

I second the desire to be able to search for specific icon IDs. Sometimes I have a spell that I know, but it still won't show up for some reason. Not to mention the ability to use icons that aren't actually assigned to spells, like, as an oddly specific example, inv_misc_profession_book_cooking

Shouldn't be hard to do but I don't play wow anymore. If someone wants to contribute the change I'll accept the pr and make the release